SUS304 Stainless Steel Welded Pipe IN HOUSE TESTING OPTION:
HYDRO TEST UP TO 15000 PSI
All type of Fittings & valves are tested at a specified static pressure for a predetermined period for no leakage.
SOME SPECIAL TEST ON REQUEST OF CLINTS:
PNEUMATIC/GAS TEST
ALL COMPRESSORE AND THREADED FITTINGS and valves are subjected to Pneumatic test at 150psi air pressure and 2000psi Nitrogen pressure. Pneumatic/Gas test is carried out after hydro testing and complete drying of the items following Hydro-Test.
Helium Gas Test (HG-TEST) can be offered on request:
PRESSURE CYCLE TEST
All fittings and valves are tested for pressure cycle test where pressure surges from Opsi to 5000psi. The test is conducted at the rate of 25 to 45 cycles per minute with the digital counter. Client can specify number of cycles and condition of test.
TEMPRATURE TEST ON REQEUST
fittings and valves are heated to temperature upto 350oC for one complete cycle of 4 hours. After that valves are again subjected to Hydro, Pneumatic and Pressure cyclic test for no leakage. All the above test are certified by our own Quality control department and can be witnessed by client or third party inspection company of client's choice.
VIBRATION TEST
fittings and valves are tested for severe vibration under impulse pressure for no leakage
SUS304 Stainless Steel Welded Pipe Stage wise Inspection
Sr. No. | Process Description | Ref. Documents Standards | Characteristic to be checked | Samples quorum of size/inspection | Instrument equipment used for testing | Acceptance criteria |
2 | I) Welded Tube forming & Welding | As per Work order/ Specification | Dimensions check Diameter (Ovality) x Length x Thickness | 3 Samples from each Coil 1 Sample from each lot | Universal testing | Dimensions acceptance as per order, Confirmation to standard samples as per details |
3 | Annealing | Temperature as per ASTM Standards | • Temperature | 1 Sample per lot / 1 Sample per heat | Digital Graphic, Temperature Recorder, Digital Temperature Indicator & Temperature Controller, Metallurgical Microscope, Brine Rockwell Hardness Tester | |
4 | Straightening | Straightening as per specification | Check straightening of Pipes & Tubes | First 2 pipes of each size lot | Roller Straightening Machine, Micrometer, Visual Observation | Straightening as per specification & standard sample |
5 | End Facing / Squaring & Beveling | Burr-Free Squaring / Beveling with Proper V-Shape | 100% Visual inspection | Abrasive Polishing as per standard sample | Confirmation to specifications / requirements | Straightening as per specifications |
6 | Hydrostatic Testing | As per ASTM standard | Leakages | 100% | Hydraulic Pressure Tester | No Leakage |
7 | Picking | As per required ASTM standard | • Scale removing inside | 100% | Visual Observation | Confirm to requirement |
8 | Final Inspection Physical / Chemical Testing | As per applicable standard | Visual Dimension, Physical & Chemical | 100% (or) as per ASTM standard | Micrometer, Vernier, Universal Testing Machine, Molly Detector & Caron sampling at Random Spectra / Wet Method | Confirmation to requirements |
9 | Marking (as per) customer requirement / | As per requirement | • Spell check | 100% Confirm on first two sample & continue | Inkjet machine / Electro Etching co-relation of heat no size Grade, etc. with Test Certificate | Confirm to requirement |
10 | Packing & Delivery | As per customer requirement | Packing quality Tightness of packing | 100% confirm to requirement and release for | Box Crate, Polythene, Hessian Cloth | Packing according to customer requirements |
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